Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterFast, Reliable Furnace Repair Across San Rafael
Furnace repair in San Rafael typically runs $150 to $700 depending on the failed component, and most jobs are completed the same day we diagnose them. San Rafael’s microclimates swing hard: the flats near the bay hold damp marine air that rusts burner assemblies, while the hills above downtown hit colder winter mornings that push older furnaces past their limits. When your heat goes out in the Terra Linda hills or a furnace won’t light in Gerstle Park, you need a technician who knows which side of the fog line your house sits on. Call (361) 306-9515 and you’ll get a live person, a written price before any work starts, and a repair guaranteed in writing for a full year.
Why Dalton Heating & Air Is San Rafael’s Preferred Furnace Repair Company
Dalton Heating & Air operates under The Garrison Standard, a set of operating rules that have been in place since 2003. For San Rafael homeowners, that means every furnace repair starts with a written diagnosis and a fixed price, not an estimate that shifts once the tech is in your driveway. Our technicians arrive inside the stated window, wear uniforms, and carry background checks you can verify before they walk in. No no-shows from our Furnace Repair team, no price changes at the door.
Marco Benitez, who leads our Bay Area operations, holds every San Rafael call to The Garrison Code: arrive inside the window, price in writing before starting, do the job by the book, leave the site clean, and stand behind the work for a full year. If a repair fails within 365 days, we return at no charge. That’s not a warranty upgrade. It’s the default. San Rafael homeowners who have been burned by chop shops that quote one number and bill another tend to notice the difference quickly. Dispatch and scheduling are coordinated from the brand’s San Francisco Bay Area office, and crews serve San Rafael locally.
Gas Furnace Repair in San Rafael
Gas Furnace Repair in San Rafael means diagnosing and fixing the components that keep a forced-air gas furnace burning clean and blowing warm: the ignitor, flame sensor, gas valve, blower motor, control board, and heat exchanger. In San Rafael specifically, the damp air that drifts off Richardson Bay settles into crawl spaces and furnace cabinets, accelerating corrosion on burner assemblies that would stay clean in drier inland towns. We see pitting and rust on furnaces that look fine from the outside, especially in the flats around the Canal and downtown neighborhoods. A gas furnace repair here runs $150 to $700 depending on the part.
Ignition and Gas Valve Work
When a San Rafael furnace won’t light after the first cold snap, it’s often a failed ignitor or a flame sensor coated in residue from a summer of sitting idle near the bay. We test the sequence of operation, confirm gas pressure at the valve, and replace only what failed. Furnaces with original gas valves from the mid-2000s often need a valve replacement by year 15 or 18, and that work falls inside the same $150 to $700 range.
Heat Exchanger and Burner Repairs
Safety matters here. A cracked heat exchanger can leak carbon monoxide into a home, so any San Rafael furnace with a suspected crack gets shut down and tested before we discuss repair versus replacement. Burner corrosion from marine moisture is repairable in many cases, but a cracked heat exchanger on an older unit usually means replacement. We’ll show you the crack with a borescope camera so the decision is yours, made on evidence, not pressure.
Furnace Tune Up in San Rafael
Furnace Tune Up in San Rafael is a flat-rate service call that runs $80 to $200 and takes about an hour. We inspect the heat exchanger for rust, test the ignitor and flame sensor, check gas pressure, measure temperature rise across the exchanger, clean the burners, and tighten electrical connections. In San Rafael’s damper zones, we also check for moisture intrusion around the cabinet and standing water near the base, which shortens furnace life in houses from the 1950s and 1960s around Sun Valley and the West End. A tune-up before the cold snaps in November catches the failures that show up when a furnace that sat idle all summer suddenly won’t light.
What a Tune-Up Catches
The tune-up is where we find flame sensors that are on their way out and burners that are starting to pit. Catching those before the first sustained cold stretch costs you $80 to $200 now instead of a $150 to $700 emergency repair later. We write the findings down and give you the report, and our technicians are not paid on what they sell.
Who Should Schedule One
If your San Rafael furnace is more than eight years old and you live near the bay side where the fog lingers, an annual tune-up is the cheapest insurance you’ll buy this year. Hillside homes in the San Rafael hills get colder overnight lows, so their furnaces run harder and benefit just as much. The report you get is yours to keep, and the price is in writing before we touch the unit.
Trusted Brands We Service in San Rafael
Dalton Heating & Air is factory-trained to service nine major residential HVAC brands, and the ones we see most often in San Rafael homes are Goodman, Rheem, York, and Daikin. We stock common repair parts for these brands in our Bay Area warehouse, which means most San Rafael repairs don’t wait on a parts shipment. Whether you’ve got a 1990s Rheem that just won’t die or a newer Goodman with a control board fault, our techs have worked on that platform before. A written price and a written guarantee come with every brand we service, no exceptions.
Common Furnace Repair Problems We See in San Rafael Homes
- Marine-air corrosion on burners and heat exchangers. Homes in the flats near the bay, from the Canal up through downtown, collect damp air that rusts furnace internals. We regularly open cabinets in San Rafael and find pitted burners on units that look clean from the outside.
- Short-cycling from undersized returns and high static pressure. Older San Rafael homes, especially 1950s and 1960s ranchers in Terra Linda and San Anselmo-adjacent neighborhoods, often have undersized return ductwork. The furnace overheats, shuts off early, and gets misdiagnosed as a bad unit when the ductwork is the actual problem.
- Ignition and flame-sensor failures after the first cold snap. Furnaces that sat idle through San Rafael’s mild summer and early fall sometimes won’t light reliably on the first cold morning. In the bay-side microclimate, moisture compounds this: sensors corrode faster than they would in drier parts of the North Bay.
- Blower motor failures in older hillside homes. Furnaces in the San Rafael hills run longer and harder through colder winter nights. We see failing blower motors in systems that are otherwise sound, and replacing a motor is a $150 to $700 repair, not a replacement call.
Pricing for Furnace Repair in San Rafael, CA
Here’s what furnace work actually costs in San Rafael. A diagnostic plus a common repair, like an ignitor, flame sensor, or blower motor replacement, runs $150 to $700. A furnace tune-up is $80 to $200. The biggest cost variable is the part: a $40 flame sensor and a $350 control board are both “repairs,” but the bill looks different. We write the price down before starting so you approve the number, not a range. Estimates are free, and the written guarantee covers the repair for a full year.
| Service | Price Range |
|---|---|
| Furnace Repair (diagnostic + common repair) | $150 – $700 |
| Furnace Tune Up | $80 – $200 |
We Also Serve Cities Near San Rafael
Dalton Heating & Air runs furnace repair calls to Larkspur, Kentfield, Corte Madera, and San Anselmo, with the same written pricing and the same one-year guarantee. If you’re just outside San Rafael proper, call (361) 306-9515 and we’ll schedule a crew for your neighborhood. The Garrison Standard applies on every job, in every city we serve.
Serving San Rafael, CA - Our Local Coverage Area
We’re based in the San Rafael area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in San Rafael
The repair-versus-replace call comes down to the heat exchanger, the furnace’s age, and your home’s ductwork, and San Rafael’s microclimates move the line. A 12-year-old furnace with a failing blower motor in Gerstle Park is almost always a repair. A 20-year-old Carrier with a cracked heat exchanger in the Dominican hills is almost always a replace. We’ll show you the evidence and give you a written price for either path. For an honest read on your unit, call (361) 306-9515.
A common furnace repair in San Rafael runs $150 to $700, depending on the part that failed. Ignitors, flame sensors, and capacitors sit at the low end; gas valves and blower motors sit at the high end. A tune-up runs $80 to $200. You’ll get the exact number in writing before any work begins.
Short-cycling is when a furnace turns on and off every few minutes instead of running a full cycle, and in San Rafael the most common cause we find is restricted return airflow from undersized ductwork in older homes. High static pressure trips the high-limit switch, the furnace shuts off, and then it restarts a few minutes later. It’s often misdiagnosed as a bad furnace when the ductwork is the problem. We measure static pressure before recommending any repair. Call (361) 306-9515 for a diagnostic that looks at the whole system, not just the furnace cabinet.
Yes, and for San Rafael specifically, the load calculation matters more than in most Bay Area cities because of the fog line. A furnace sized for the damp, mild flats near the bay will be undersized for a hillside home above the fog line that sees colder overnight lows. A proper Manual J load calculation uses your home’s actual square footage, window orientation, insulation, and microclimate, not a rule of thumb. Skip it and you’ll oversize or undersize the unit. We run the calculation on every replacement quote.
SEER2 is the cooling efficiency rating, but for a furnace the number you care about is AFUE: the percentage of fuel that becomes heat. An 80% AFUE furnace sends 20 cents of every gas dollar up the flue. A 96% AFUE furnace sends 4 cents. In San Rafael, where winter heating demand is modest but real, the payback on a high-efficiency furnace is longer than in cold climates, but a 96% unit also runs quieter and vents with PVC instead of a metal flue. We’ll run the numbers on your actual gas bill before recommending an efficiency tier. Call (361) 306-9515 for a straight answer.
Written by Marco Benitez, Owner at Dalton Heating & Air, serving San Rafael since 2003.